//
//Copyright (C) 2005 United States Government as represented by the
//Administrator of the National Aeronautics and Space Administration
//(NASA).  All Rights Reserved.
//
//This software is distributed under the NASA Open Source Agreement
//(NOSA), version 1.3.  The NOSA has been approved by the Open Source
//Initiative.  See the file NOSA-1.3-JPF at the top of the distribution
//directory tree for the complete NOSA document.
//
//THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
//KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
//LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
//SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
//A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
//THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
//DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
//

package gov.nasa.jpf.symbc.numeric;

public enum Comparator {

   EQ(" == ") { public Comparator not() { return NE; }},
   NE(" != ") { public Comparator not() { return EQ; }},
   LT(" < ")  { public Comparator not() { return GE; }},
   LE(" <= ") { public Comparator not() { return GT; }},
   GT(" > ")  { public Comparator not() { return LE; }},
   GE(" >= ") { public Comparator not() { return LT; }};

   private final String str;

   Comparator(String str){
	   this.str= str;
   }
   
   public abstract Comparator not();
   
   @Override
   public String toString() {
	 return str;
   }
}